*{
    margin: 0;
    padding: 0;
}
.classs{
    display: flex;
    .left{
        width: 100px;
        background-color: #eee;
        text-align: center;
        .container{
            width: 100%;
            padding: 20px 0;
            float: left ;
            box-sizing: border-box;
        }
    }
    .right{
        flex: 1;
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
        .container{
            width: 33%;
            text-align: center;
            img{
                width: 80%;
                margin: 10px 0;
            }
        }
    }
}
.active{
    border-left: 5px solid red;
    color: red;
    background-color: white;
}